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Scientists build rice grain-sized laser powered by quantum dots

New grain-sized laserScientists at Princeton have built a tiny microwave laser (a "maser") the size of a rice grain. The laser is made of artificial atoms called quantum dots -- miniature bits of semiconductor material.

"It is basically as small as you can go with these single-electron devices," lead study author Jason Petta, an associate professor of physics at Princeton, said in a recent press release.

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Space station crew moved after gas leak fears

ISS crewCrew members were evacuated from a US segment of the International Space Station after an ammonia leak was suspected.

But Nasa officials now says a sensor problem probably created the false impression of leaking coolant.

The Russian space agency emphasised that the crew members had not been in any danger.

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SpaceX Suffers Hard Landing on Barge

space xSpace rocketeers at SpaceX just missed a catch on Saturday, failing in a bold first attempt to recycle a used rocket engine by landing it on a ship in the Atlantic Ocean.

"Close, but no cigar this time. Bodes well for the future," said SpaceX chief Elon Musk on Twitter. The touchdown would have been a first for ocean landings.

The landing attempt was made shortly after a flawless 4:47 a.m. (EST) launch of the resupply spacecraft from the Cape Canaveral Air Force Station in Florida.

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Researchers Create Artificial Organs On Microchips

Organs on computer chipsGreat balls of cells! Scientists are developing mock human organs that can fit in the palm of your hand.

These organs-on-a-chip are designed to test drugs and help understand the basics of how organs function when they are healthy and when they are diseased.

For instance, you have your gut-on-a-chip being developed at the Johns Hopkins School of Medicine. It's a high-tech approach to dealing with a scourge of the low-tech world.

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Intel creates a new tool to help Stephen Hawking communicate

Stephen HawkingEddie Redmayne is learning about much more than the beguiling life of Stephen Hawking, whom he plays in the recently released biopic Theory of Everything.

At Intel Labs here, the Tony-winning actor is on hands and knees to get a better look at a specially tailored communications system for Hawking, who has a motor neuron disease (MND) related to ALS that has worsened over the years, rendering him nearly paralyzed.

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World's first computer dates to 205 BCE, earlier than thought

Antikythera MechanismLong considered the world's first computer, the Antikythera Mechanism is now thought to be 100 years older than first determined, researchers said.

The bronze mechanism, discovered in 1901 in a shipwreck off the Greek island of Antikythera, was initially dated to 150 to 100 BCE, but researchers now found that it recorded a solar eclipse that happened on May 12, 205 BCE.

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9,300-year-old mummified bison discovered in Siberia

Siberian bison mummyMembers of the Yukagir tribe in Siberia discovered a 9,300-year-old frozen bison mummy complete with all its organs and even some fur.

Details of the necropsy of the animal, which was discovered in 2011, were presented recently at the Society of Vertebrate Paleontology's annual meeting in Berlin.  The animal, dubbed the Yukagir bison mummy, is a steppe bison or bison priscus, which went extinct after the Ice Age. Never has a steppe bison mummy been found so complete.

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